The Filter Element,fluid, cataloged under National Stock Number 4330-01-455-9834, is classified within Federal Supply Class 4330 (Centrifugals, Separators, and Pressure and Vacuum Filters) of the Pumps and Compressors group. The manufacturer of record is Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4330-01-455-9834 |
| Primary Part Number | 21888-12-40 |
| Item Name | Filter Element,fluid |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div |
| Status | ACTIVE |
| Body Diameter | 0.400 INCHES NOMINAL IN |
| Body Overall Length | 2.000 INCHES NOMINAL IN |
| Style Designator | CYLINDRICAL W/OUT CONTAINER |
| Filtering System for Which Designed | FULL FLOW |
| Media for Which Designed | AIR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21888-12-40 PRIMARY | Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div (USA) |
| 4900099 | Rtx Corporation Div Pratt & Whitney (USA) |
NSN 4330-01-455-9834 is a Filter Element,fluid, manufactured by Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-455-9834 has 2 manufacturer part numbers on file: 21888-12-40 (Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div), 4900099 (Rtx Corporation Div Pratt & Whitney).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-459-2014. Verify interchangeability with system specifications before substitution.
Key specifications for 21888-12-40: Body Diameter: 0.400 INCHES NOMINAL IN; Body Overall Length: 2.000 INCHES NOMINAL IN; Style Designator: CYLINDRICAL W/OUT CONTAINER; Filtering System for Which Designed: FULL FLOW. 5 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.